Anisotropic Sm–Fe–N magnets produced by compression shearing method

Abstract

Sm–Fe–N bulk magnet was produced by the compression shearing method. X-ray diffraction studies revealed that the magnet retained the original Sm2Fe17N3 phase structure without any appreciable decomposition of the Sm2Fe17N3 phase and that this phase had a pronounced crystallographic alignment. Magnetic measurements confirmed that the Sm–Fe–N magnet was magnetically anisotropic. The bulk anisotropic Sm–Fe–N magnet exhibited a high remanence value of 9.43kG with a high coercivity of 11.0kOe.

Hard magnetic properties of anisotropic Sm–Fe–N magnets produced by compression shearing method

“…It has been demonstrated that Sm-Fe-N powder, which is also not stable at high temperatures, can be consolidated into bulk material by the compression shearing method [14,15]. The reported magnetic properties, however, were not entirely satisfactory, as (BH) max ¼ 142 kJ/m 3 for Sm-Fe-N magnets.…”

Additive Manufacturing of Anisotropic Sm-Fe-N Nylon Bonded Permanent Magnets

“…For example, Sm-Fe-N bulk magnets are developed using consolidation techniques such as shock compaction [7,8] , hot-pressing [9] and compression shearing methods. [10][11][12] Magnet manufacturing of bonded magnets has greater flexibility over both sintered and hot deformed type magnets. Mainly, two approaches, compression and injection molding have been chosen as benchmark techniques to fabricate rare earth bonded magnets.…”

Role of MoS₂ Addition in the Consolidation of Metal from Powder to Plate by the Compression Shearing Method at Room Temperature

“…Several methods to form composites, such as powder metallurgy and casting-based methods have been attempted to achieve such requirements [1][2][3][4][5][6][7]. In recent years, our research group has focused on a novel powder-molding method, the compression shearing method at room temperature (COSME-RT) [8][9][10][11][12][13][14][15][16][17][18][19], to meet the material requirements. COSME-RT is used to form a thin plate by applying a simultaneous compressive stress and shearing strain to a powder material at room temperature and in an ambient atmosphere.…”